Oenothera elata

Oenothera elata

Hooker evening primrose

Previous scientific name(s): Oenothera hookeri

Formerly known as Oenothera hookeri. Moderate water requirement; full sun to partial shade; biennial. Yellow flowers bloom June to September along open slopes, roadsides, moist lowlands, and streams from valleys to midmontane. Can grow quite tall.

Varieties: 

Species Attributes

Height: 
36 
- 48 
in.
Life Form: 
Biennial
Native or Introduced: 
Native
Precipitation: 
Low - Moderate
Sun & Shade Tolerance: 
Full Sun
Part Sun
Elevation: 
ft.

Soil Texture

Coarse: 
Not Adapted
Moderately Coarse: 
Average
Medium: 
Best
Moderately Fine: 
Average
Fine: 
Not Adapted

Soil pH

Acidic: 
Marginal
Neutral: 
Best
Basic: 
Marginal
Seeding Rate: 
PLS lbs/Acre
Pure Seed per Bushel: 
36.40 lbs.
Seeds per Pound: 
1,300,000
Germination Time: 
Days
Mycorrhizal Dependent: 
Yes
Bloom Color: 
Yellow
Blooming Season: 
Summer